**About the Editors**

**Giovanni M. Colpi** is a specialist in Urology, Andrology and Endocrinology. He is the Scientific Director and Head of the Andrology Unit, Next Fertility ProCrea, Lugano, and Academician of the European Academy of Andrology. He was formerly the Head of AndroUrology and IVF Unit, San Paolo Hospital, University of Milan, Adjunct Professor in Andrology, Universities of Milan, Pavia, and L'Aquila. Member of the Committee for the Guidelines on OligoAsthenoTeratozoospermia of the European Academy of Andrology. He was also a former Member of the Health Care Office for Guidelines on Male Infertility of the European Association of Urology (2000–2008). He is a member of the Editorial Board of Andrologia and the International Journal of Fertility and Sterility. He is also the author of many articles in peer-reviewed international journals

**Ettore Caroppo** MD, is a specialist in Endocrinology and the course of Andrology. He has served as the Chief Clinical Andrologist at a Reproductive and IVF Unit since 1998. Since 2011 he has been a member of the Editorial Board of Fertility and Sterility, and since January 2022 he has been an Associate Editor of Human Reproduction. He has authored many articles in peer-reviewed international journals, in addition to book chapters of international manuals on male infertility.
